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TABLE5 FLOW RATES AND ANALYTICAL RESULTS OF AIR SAMPLE ANALYSIS Former ARCO Service Station No.548 . 1612 Hammer Lane,Stockton,California Date Flow Rate"' Vacuum Sample Analyses m m' cfin ("WC Location TPH Benzene Toluene Eth (benzene Xylenes MTBE T-Influent 2,650 9.83 116 55.9 241 123 09/28/00 54 18 Influent 9,870 60.1 439 207 874 416 Effluent 19.7 .214 .247 .217 1-28 <0.5 T-Influent 1,920 8.56 70.2 48 227 50.1 10/19/00 46 16 Influent 7,430 20.4 340 193 911 218 Effluent <10.0 <0.05 .0502 <0.05 0.119 <0.5 T-Influent 1,500 2.98 46.9 38.6 189 NR 11/28/00 42 20 Influent 5,910 13.2 192 156 747 NR Effluent <10.0 <0.05 <0.05 <0.05 <0.05 NR T-Influent 2,810 3.84 68.2 53.5 266 14.6 12/07/00 49 10 Influent 6,050 9.2 173 136 641 33.9 Effluent <2.8 <0.016 <0.013 0.014 0.013 0.5 T-Influent 203 0.128 4.18 3.72 20.1 <0.5 118/01 46 17 Influent 300 0.188 6.61 5.33 27.9 <0.5 Effluent 54.8 0.068 1 <0.05 <0.05 0.064 <0.5 T-Influent 2611" <0.05 4.01 4.55 - 24.8 <0.5 01/23/01 32 26 Influent 3011[1 0.052 4.65 5.13 27.3 <0.5 Effluent <10.0 <0.05 <0.05 <0.05 0.09 <0.5 T-Influent 2,1301 <2.5 45.5 59.6 274 <25 02/06/01 32 26 Influent 2,5801 <2.5 52.8 68.2 318 <25 Effluent <10.0 <0.05 <0.05 <0.05 0.074 <0.5 T-Influent 1,390 <2.5 12.1 47.8 279 <25 03/07/01 30 22 Influent 1,770 <2.5 16.7 53.9 370 <25 Effluent <10.0 <0.05 <0.05 <0.05 0.074 <0.5 T-Influent 1,670 <0.5 4.64 48.6 297 <5 04/23/01 32 22 Influent 1,830 <2.5 8.62 58.9 365 <25 Effluent <10.0 <0.05 <0.05 0.068 0.690 <0.5 T-Influent 220 <l 06/04101 40 25 Influent 1,100 <5 <5 19.0 160 <25 Effluent <10 <0.1 <0.1 <0.1 <0.1 <0.5 T-Influent 19 0.08 0.11 0.35 3.3 <0.5 07/23/01 46 36 Influent 23 <0.05 0.064 0.37 3.9 <0.5 Effluent <10 <0.05 <0.05 <0.05 <0.05 <0.5 T-Influent 11 <0.05 <0.05 0.14 1.7 <0.5 09/06101 60 30 Influent 18 <0.05 <0.05 0.22 2.6 <0.5 Effluent <10 <0.05 <0.05 <0.05 <0.05 <0.5 T-Influent 1,000 <2.5 10 5.7 110 <25 _09105101 _ 56 35 Influent <2,000 <10s- -- <10' <10• 65.0 <100' Effluent <]0 <0.05 <0.05 <0.05 <0.05 <0.5 T-Influent 690 <0.50 <0.50 4.4 62 <5.0 10/01101 50 40 Influent 770 <0.50 <0.50 4.8 67.0 <5.0 Effluent <10 <0.050 <0.050 <0.050 <0-050 <0.50 T-Influent 940 0.71 2.0 1.9 47 <5.0 11/05/01 60 50 Influent 990 [0150 2.0 2.1 51 <5.0 Effluent <10 <0.050 <0.050 <0.050 [0.050 <0.50 T-Influent 880, <0.25 2.3 2.7 30 <2.5 01/08/02 45 55 Influent 1,2000.60 2.4 4.0 43 <5.0 Effluent <10 <0,050 <0.050 <0.050 <0.050 [1-73 T-Influent 570, <2.5 9.1 <2.5 25 <25 02!04!02 45 60 Influent 600 l <2.5 6.2 <2.5 21 <25 Effluent <10 <0-050 <0.050 <0.050 <0.050 <0.50 T-Influent SBQ <25 4.1 12 84 <25 03/04/02 40 SD Influent 570 1.8 1 .1 1.1 16 <5.0 Effluent ❑0 [0.050 <0.050 <0.050 <0.050 <0.50 mglm'=mmeter.. per cubic Flaw rates are avenges between sampling events(before dilution air) WC=inches Water Column NR-Not reported T-influent-Influent to catox after dilution "=Weathered Gasoline C6-C12+Unidentified Hydrocarbos C6-C12 TPH-total petroleum hydrocarbons t=Hydrocarbon pattern does not resemble pattern of the requested fuel Arco_0548_Quanerly_0&M.XLS Page 1 of 1 Delta